Genuine UJ175 Alienware Aurora ALX Aurora R2 XPS 700 710 720 730 630 630i HDD Hard Drive Plastic Black Caddy Tray Bracket Genuine Dell Plastic Black Hard Drive Caddy for Select XPS and Alienware Systems Hard Drive Caddy | Color: black | Plastic Compatible With: Alienware Aurora ALX R2 Systems Compatible With: For XPS 700 710 720 730 630 630i Case Compatible Part Numbers: UJ175, 0UJ175